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<p>The possibility of introducing ruthenium ions into hydroxyapatite (HAP) with the formation of a HAP—Ru complex <i>via</i> the cocrystallization and sorption routes was shown. The morphology of the HAP—Ru composite depends on the Ru/Ca ratio when introducing ruthenium at a certain stage of the HAP synthesis. The time of reaching the maximum sorption is greatly affected by the synthesis method for HAP and its HAP—Ru complex. In the case of the precipitation and cocrystallization method, this time is 1 h, and when obtaining HAP by the enzymatic method (HAP<sub>E</sub>) using alkaline phosphatase this time is 1 min. This is due to the significantly more developed external and internal surfaces of HAP<sub>E</sub>. The sorption binding of ruthenium ions with HAP is almost irreversible. The introduction of ruthenium radionuclides (<sup>106</sup>Ru as an example) into similar composites is possible both at the synthesis stage and during sorption, while the isotope exchange does not make a significant contribution to this process.</p>

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Cocrystallization and sorption routes of binding ruthenium ions with hydroxyapatite

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • V. Yu. Yaryshev,
  • A. V. Severin,
  • M. A. Orlova

摘要

The possibility of introducing ruthenium ions into hydroxyapatite (HAP) with the formation of a HAP—Ru complex via the cocrystallization and sorption routes was shown. The morphology of the HAP—Ru composite depends on the Ru/Ca ratio when introducing ruthenium at a certain stage of the HAP synthesis. The time of reaching the maximum sorption is greatly affected by the synthesis method for HAP and its HAP—Ru complex. In the case of the precipitation and cocrystallization method, this time is 1 h, and when obtaining HAP by the enzymatic method (HAPE) using alkaline phosphatase this time is 1 min. This is due to the significantly more developed external and internal surfaces of HAPE. The sorption binding of ruthenium ions with HAP is almost irreversible. The introduction of ruthenium radionuclides (106Ru as an example) into similar composites is possible both at the synthesis stage and during sorption, while the isotope exchange does not make a significant contribution to this process.